Rotary mold filling machine



Oct; 30-, 1945. F. TAGER 2,387,

ROTARY mom) FILLING MACHINE Filed April 3, 1942 ZqShetS-Sheet 11 /7/ S Hi a/v73] l I JNVENTOR:

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Oct. 30, 1945. s F; "(GER 2,387,782

ROTARY MOLD FILLING MACHINE Filed April 3, 1942 2 Sheets-Sheet 2 Flea.

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' INVENTOR- Patented Oct. 30, 1945 UNITED STATES PATENT OFFIQE ROTARY MOLD FILLING MACHINE Frank Tager, New York, N. Y. Application April 3, 1942, Serial No. 437,520

4 Claims. (01. 18Z6) This invention relates to devices for filling cavities of mold with a molten material, like wax, metal, and the like, and it particularly relates to such devices for the jewelry trade, and has for its main object to provide a device of this character which will be more efficient than the devices now used for such purpose.

Another object of my invention is to provide a device, a characterized hereinbefore, which will b mechanically operated, easily and quickly set in motion, and which will have automatic means embodied therein to stop said motion very quickly, thereby avoiding any waste of time, effort. and needless use and wear of machinery.

Still another object of my invention is to provide a device of this type which will be double acting, that is, which may fill two molds simultaneously or in succession, using the same mechanical means for setting both of them into motion.

Still a further object of my invention is to provide automatic means to terminate or cut-off the rotation of a machine element set into such rotation in a pre-determined manner.

Other objects of my invention will be apparent as the specification of the same proceeds, and among others I may mention: to provide a device of the above nature, which will be simple in construction, inexpensive to manufacture, to install and to operate, and which will be particularly adapted and arranged for the jewelry trade, having a novel frame construction and working bench embodied therein.

It is also to be understood that my invention is highly useful in the novelty, dental and all other trades where comparatively light castings are to be made in mold cavities.

In the drawings forming a part of this specification and accompanying the same:

Fig. 1 is a perspective view of my novel mold filling machine, particularly designed for the jewelry, novelty, dental and other trades and having two operating units therein;

Fig. 2 is a fragmentary sectional view on an enlarged scale of a driving shaft and its associated parts used in my machine, the section be ing taken as indicated by the line 22 in Figs. 1 and 3;

Fig. 3 is a fragmentary front elevational view of the mechanism shown in Fig. 2, and

Fig. 4 is a detail, showing said mechanism set into an operative position;

Fig. 5 is a fragmentary elevation of an operating lever used in my device, and being shown on a still larger scale, and

Fig. 6 is a sectional elevation thereof, the section being taken on the line 6-6 of Fig. 5.

Referring now-to the drawings more in detail by characters of reference, my mold filling machine in its preferred form, as shown in Fig. 1, consists in a frame or bench construction, generally indicated by the numeral 0, having two side walls [I and I2, a rear wall l3, a table II, and possibly a lower support IE on which may be secured the driving motor l6 for my device, as will be understood by those versed in this art. Two downwardly depending containers I1 and I8 are secured in the table l4, and rotating vertical shafts l9 and 20, respectively, are arranged in the centers of the containers l1 and IS.

A longitudinally extending shaft 2| is secured on and in front of the central portion of the rear wall I3, between said two containers and to t e rear and below them. Said shaft 2| is adapted to be rotated by the motor "5, as through the endless belt 22, as will be understood. At the right hand end of the shaft .2| is secured a clutch disc 23, and a similar, but oppositely placed clutch disc 24 is secured at the left end of the shaft 2|.

To the right of the shaft 2 a right hand longitudinal shaft 25 is secured on the rear wall l3 in axial alignment with the shaft 2|, but separated therefrom by a comparatively narrow space 26, and a similar, but oppositely placed longitudinal shaft 27 is placed to the left of the central 1ongitudinalshaft 2| separated therefrom by the narrow space 28.

The right hand shaft 25 is used to drive the mold filling mechanism in the container I! when desired, and the shaft 21 at the left side is used to drive the mechanism in container I8. The two containers and their driving mechanisms are entirely identical, only, of course, oppositely placed at the two sides of the central drive shaft 2| therefore, a detailed description of one will be sufficient.

Proceeding now to the description of the right hand driving mechanism for the mold filling device in container ll, shaft 25 is provided with a clutch disc 29 adapted to cooperate with the clutch disc 23 secured oppositely thereto at the a horizontal cooperating belt pulley 35 is secured at the lower end of the vertical shaft l9 of the container IT, and an endless belt 36 transmits the rotation of shaft to shaft l9 through the pulleys 34 and 35, as will be understood.

A slidable ring or sleeve 31 is also arranged on the shaft 25 in close proximity to the clutch disc 29, and a rockable or pivoted lever 38 is secured to said ring 31, as by the securing element 39. Said lever 38preferably is provided withanupwardly turned transverse fiat projection or end flange 40 which is loosely secured on the rear wall l3 as by the screw 4|, said flat, preferably rectangular upward flange 40 being. spaced apart from the inner surface i3a of the rear wall I3 to a small distance and also having aholeor aperture 40a therein slightly larger'than' thedi ameter of the screw 4| at that place, so that said lever 38 may be rocked in a right'hand or left hand direction when desired and as indicatedby the doublearrow 42; The clutch .disc 29 mayhave a hub 29a secured thereon, and inthe normalzinactive or central position of the lever 38, asmall space 43' is left. between the opposing faces of the sleeve 31 and hub 29a.

v A transverse element 44" is secured to the upper end of. the vertical shaft l9 and amoltenwaxor metal receivingcontainer'or device 45 is secured on said transverse element. 44' to'theJeftside of the shaft I9, whileza'counterbalancing weight 46 is secured thereon to .the right side 'of said shaft. Container. 45 has an openingin its outer surface or face 41, as'indicated bythe dottedlines 48, and an adjustable receiving device 491is secured on the outer left. end .of the transverse member 44'. The. mold'to be filled by the molten material, like wax'or metal, is placed into the receiver.49, (not shown)., and the filling of the mold will be executed by ejectingorshooting the molten wax or metalfrom .the container 45 into the mold in the receiver 49 by centrifugal action upon a quick rotation of .the shaft IS, the mold being made and arranged'in such a'manner that it will have an opening opposite to the opening48 for the molten material, through which openings the molten ma terial may travel from itscontainer into the mold.'

There is .nothing' new in this operation, since filling molds with molten'wax by arranging them on a rotating arm together'with acontainer of the molten wax in the manner asrdescribed'hereinbefore, hasbeen practiced in thejewelers'and other trades for some time past; such an operation is well known in this art and will be fullyunderstood from the herein description.

The rotation of the carrying element with the molten material container and'the-mold thereon hasbeen produced hereinbefore in the jewelers and. other trades .when the same, was practiced by arranginganappropriatespring around the shaft of the rotating device, the operator'manually turning'the' same against the tension-ofthe springfand then. permittingit to rotate backwards on the influence of the spring tensionand at: a comparatively high sp ed, thereby causing the molten'wax 'to be shot by-centrifugal action intothe cavity of the mold.

The drawbacks of thisdevice and operation have been many. The operator had to wind up the.spring at every. operation inga slow, awkward andlaboriousmanner; thenwhen'the spring was free, the. device would rotate in" the opposite direction" quite a longtime, the time ofsaidreversed or filling rotation and its amount being entirely uncertain moreor less at each time, and the operator had no means to figure it and to reduce it to a desired minimum, thereby causing great loss of time, effort and operation of the machinery. The spring after a comparatively short use became loosened or entirely worthless and it had to be frequently exchanged, and, in general, frequent adjustments and repairs were needed. Finally, very often, the speed of the rotation was not suflicient to completely and perfectly fill the mold, and this operation was not adapted for heavier materials, like molten metal,

.but only for a comparatively light flowing wax.

Now the use and operation of my device may bedescribed' as follows:

The mold to be filled is placed in the receiver 43- on the transverse member 44 with its filling opening towards the molten material, like wax container 45, the molten wax is poured into said container, the opening of said container being in registering relation with the opening in the mold, as has been indicated hereinbefore;

Now the operator will move the lever 38 in a'left hand direction, thereby causing the respective surfaces of thesliding" ring 31 and' of'the hub 29a to be engaged, at a very slight left hand pressure. The hub- 29a, the clutch disc 29 and the whole shaft 25 on which they are secured is moved in a left'hand direction, as'indicated by the arrow 33, to-a slight extent, however, until the leather lining or inlay 30'will reach" the opposite clutch' disc 23 on the rotating shaft 2|, and through the frictional engagement between the clutch discs 23 and 29," shaft 25"will be set into rotation, as will beunderstood.

Through the belt 35, shaft 25 willset vertical shaft I9 in the container llinto rotation andthe transverse member with themold and molten metal container will rotate therewith, whereupon the centrifugal force acting 'on the molten wax or other material will cause the same to be shot withappropriate'velocity and force into the cavity of the mold and fill the same;

The leftward moving of the arm or lever 33 will cause the same to-take up a somewhat leftward-- ly inclined position with reference to theshaft 25, as indicated in Fig; 54;

Upon the release of the=lever 38 bythe operator, however, said lever at onc ewill return into its normal position, substantially pe pendicular to the shaft 25. Such an immediate return of 'the lever 38'upon the releasing of the same by the-op erator has been my experience, and I'may explain the same in the following manner:

It may be caused or aided simply by theupstanding flat and broad flange 40 at the' inner end of the lever 38hitting= the rear wall l3-with its left marginal portion and rebounding from the same; Since the operator will "move the lever 38 for a very short time, practically for an. in"- stant 'only to the left, because. the slightest"con nection between sleeve 31* and hub 28a, and-the slightest movement thereofto the left is sufficient clined lever 38 will cause the same to return into a normal position at right angles to the shaft 25, as will be understood by those versed in this art.

In any case, as soon as the operator so to say, touches the hub 29a with the sleeve 31, by moving the lever 38 to a very short distance to the left, the space 43, normally left between the hub 29a. and the sleeve 31 being very small, shaft 25, and ultimately the transverse member 44 with its associate parts will at once be set into rapid rotation and the operator then at once will release or free the lever 38 and. may attend to other duties, whereupon lever 38 will return to its normal inoperative position carrying with it the sleeve 31, thereby disconnecting the same from the hub 29a, and such a right hand movement of the sleeve 31, by its friction on the shaft 25, will cause said shaft also to move in a right hand direction to a slight extent, whereupon the connection between the clutch discs 23 and 29 will also be terminated, and shaft 25 will stop its rotation, thereby terminating the rotation of the associated part and ultimately of the mold, and the filling container, whereupon the ready filled mold may be removed, a new one inserted into the device, and the operation in the container I1 repeated.

I may remark that the disconnecting of clutch disc 23 and 29 and the return sliding of shaft 25 may be aided or entirely caused by the rotation of disc 23 against the uneven leather lining or inlay 30 on disc 29.

In the drawings I show a double acting device, as has been mentioned hereinbefore, having a second container I8 with a rotating shaft 20 and all the other parts described for container H. In this manner, one operator may conveniently handle two filling outfits and while shaft is in container 11 rotates, the device in container l8 may be prepared with molten material and mold and then set in rotation by moving a sliding ring 31 on driving shaft 21 for the vertical shaft 20, in a right hand direction by the lever 38a, as will be understood.

It is also to be noted that instead of the counterweight 46, a second molten material container 45a, and mold receiver 49a, may be placed on the opposite end of transverse member 44, in a reverse manner, as shown for the container l8, thereby filling two molds at every rotation.

Upper shelves 60 and GI may also be provided on my bench construction II) for obvious purposes and uses, electric outlets 62 being provided through the rear wall l3 preferably between said shelves. The side walls II and I2 and rear wall 13 also preferably are continued in vertical flanges 63, 64 and 65 around three sides of the top shelf 6|.

What I claim as new, is:

1. In a centrifugal mold filling machine, in combination, a vertical shaft with a transverse member carrying the mold to be filled, a first axially slidable horizontal shaft, a yielding driving connection between said two shafts, permitting an axial sliding of said horizontal shaft, a second horizontal shaft in axial alignment with said first horizontal shaft, but disconnected therefrom, means to permanently rotate said second horizontal shaft, cooperating clutch elements at the adjacent ends of said two shafts, normally being disconnected, a stationary member in said machine having a substantially vertical surface to the rear of said first horizontal shaft, a lever pivoted on said vertical surface and pivotedly connected to said first slidable horizontal shaft, a substantially vertical transverse member carried by said lever, adjacent to said vertical surface whereby a rocking of said lever will cause said slidable horizontal shaft to move towards said permanentl rotating shaft, thereby connecting said two clutch members and causing said first shaft and said vertical shaft to rotate, said transverse member on the pivoted end of the lever at the same time striking said vertical surface and rebounding from the same, instantly and automatically disconnecting said slidable horizontal shaft from said permanently rotating shaft.

2. In a centrifugal mold filling machine, as set forth in claim 1, said stationary member with the vertical surface being in the form of a vertical wall, and being a part of the frame of the machine, and said slidable horizontal shaft being secured thereon.

3. In a centrifugal mold filling machine, as set forth in claim 1, said stationary member with the vertical surface being in the form of a vertical wall, and being a part of the frame of the machine, and said slidable horizontal shaft being secured thereon, said lever being in the form of a flat strip of material, said transverse member thereon shaped by a vertical flange bent from the same at the inner end thereof, and said pivot on said vertical surface being formed by a bolt secured thereinto and passing through a hole in said flange.

4. In a centrifugal mold filling machine, as set forth in claim 1, said stationary member with the vertical surface being in the form of a vertical wall, and being a part of the frame of the machine, and said slidable horizontal shaft being secured thereon, said pivot connection between said lever and said first horizontal shaft being formed by a sleeve slidable on said shaft, cooperating radial surfaces on said sleeve and on the clutch member of said first horizontal shaft, whereby a rocking of the lever will move said sleeve on said horizontal shaft and also slightly incline it to the axis of the shaft, the engagement of the radial surfaces moving said clutch member and said shaft into engagement with said second permanently rotating horizontal shaft, and said momentary inclined position of said sleeve then causing its radial surface to be acted upon by the rotation of said clutch member and its radial surface to axially reversely move said sleeve and said first shaft connected therewith, thereby aiding and accelerating the disconnection of the shafts through said rebounding action of the lever.

FRANK TAGER. 

